music: index negative replaygain tags

Caused by an absurd error stemming from absurd helper function naming.

CHANGELOG.md

@@ -10,6 +10,7 @@
 - Fixed the queue list being non-scrollable in certain cases
 - Fixed notification album covers not updating after changing the cover
 aspect ratio setting 
+- Fixed negative ReplayGain adjustments not being applied
 
 #### Dev/Meta
 - Unified navigation graph

app/src/main/java/org/oxycblt/auxio/music/cache/CacheDatabase.kt

@@ -32,7 +32,7 @@ import org.oxycblt.auxio.music.info.Date
 import org.oxycblt.auxio.music.metadata.correctWhitespace
 import org.oxycblt.auxio.music.metadata.splitEscaped
 
-@Database(entities = [CachedSong::class], version = 32, exportSchema = false)
+@Database(entities = [CachedSong::class], version = 34, exportSchema = false)
 abstract class CacheDatabase : RoomDatabase() {
     abstract fun cachedSongsDao(): CachedSongsDao
 }

app/src/main/java/org/oxycblt/auxio/music/metadata/TagWorker.kt

@@ -314,7 +314,11 @@ private class TagWorkerImpl(
      * @return A parsed adjustment float, or null if the adjustment had invalid formatting.
      */
     private fun List<String>.parseReplayGainAdjustment() =
-        first().replace(REPLAYGAIN_ADJUSTMENT_FILTER_REGEX, "").toFloatOrNull()?.nonZeroOrNull()
+        first()
+            .replace(REPLAYGAIN_ADJUSTMENT_FILTER_REGEX, "")
+            .toFloatOrNull()
+            ?.nonZeroOrNull()
+            .also { logD(it) }
 
     private companion object {
         val COMPILATION_ALBUM_ARTISTS = listOf("Various Artists")

app/src/main/java/org/oxycblt/auxio/util/LangUtil.kt

@@ -55,7 +55,7 @@ fun Long.nonZeroOrNull() = if (this > 0) this else null
  *
  * @return The same number if it's non-zero, null otherwise.
  */
-fun Float.nonZeroOrNull() = if (this > 0) this else null
+fun Float.nonZeroOrNull() = if (this != 0f) this else null
 
 /**
  * Aliases a check to ensure a given value is in a specified range.